.mod_bg {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  width: 100%;
}
.mod_bg .bg__item {
  height: 300px;
  background-repeat: no-repeat;
  background-position: top;
}
.mod_bg .bg1 {
  background-image: url('https://y.qq.com/artists/js/img/bg1_1ff56fe.jpg?max_age=25920000');
}
.mod_bg .bg2 {
  background-image: url('https://y.qq.com/artists/js/img/bg2_2164d9a.jpg?max_age=25920000');
}
.mod_bg .bg3 {
  background-image: url('https://y.qq.com/artists/js/img/bg3_47318a1.jpg?max_age=25920000');
}
.mod_bg .bg4 {
  height: 600px;
  background-image: url('https://y.qq.com/artists/js/img/bg4_e5da9ba.jpg?max_age=25920000');
}
.mod_bg .bg5 {
  height: 1500px;
  background-image: url('https://y.qq.com/artists/js/img/bg5_778574a.jpg?max_age=25920000');
}
.mod_bg .bg6 {
  height: 1200px;
  background-image: url('https://y.qq.com/artists/js/img/bg6_6075417.jpg?max_age=25920000');
}
.mod_bg .bg7 {
  background-image: url('https://y.qq.com/artists/js/img/bg7_c06e0db.jpg?max_age=25920000');
}
.mod_bg .bg8 {
  background-image: url('https://y.qq.com/artists/js/img/bg8_63f24b4.jpg?max_age=25920000');
}
.wrap {
  padding-top: 0;
  margin: 0 auto;
  position: relative;
  z-index: 3;
}
.wrap .wrap-head {
  position: relative;
  height: 920px;
  overflow: hidden;
}
.wrap .wrap-head .top_box__logo {
  position: absolute;
  top: 54px;
  left: 82px;
  width: 160px;
}
.wrap .wrap-head .mod_top_login {
  position: absolute;
  right: 120px;
  top: 50px;
  line-height: 40px;
  z-index: 10;
}
.wrap .wrap-head .mod_top_login .top_login__help {
  font-size: 16px;
  margin-top: 5px;
  float: left;
  height: 32px;
  line-height: 32px;
}
.wrap .wrap-head .mod_top_login .top_login__help .top__link {
  float: left;
  color: #fff;
  background: hsla(0, 0%, 84.7%, 0.2);
  border-radius: 999px;
  padding: 0 12px 0 11px;
  margin-right: 16px;
}
.wrap .wrap-head .mod_top_login .top_login__help .top__link:hover {
  color: #31c27c;
}
.wrap .wrap-head .mod_top_login .top_login__help .top__link .icon_svg {
  float: left;
  width: 20px;
  height: 20px;
  fill: currentColor;
  margin: 7px 3px 0 0;
}
.wrap .wrap-head .mod_top_login .top_login__btn {
  float: left;
  height: 32px;
  line-height: 32px;
  display: block;
  width: 90px;
  text-align: center;
  font-size: 20px;
  color: #fff;
  border: 1px solid;
  border-radius: 34px;
}
.wrap .wrap-head .mod_top_login .top_login__btn:hover {
  color: #31c27c;
  border: 1px solid #31c27c;
}
.wrap .wrap-head .top_box__tit {
  position: absolute;
  left: 50%;
  top: 180px;
  width: 432px;
  height: 32px;
  margin-left: -216px;
  z-index: 15;
  background-size: 800px;
  font-size: 0;
  background-image: url('https://y.qq.com/artists/js/img/sprite_top_b24c015.png?max_age=25920000');
  opacity: 0;
  animation: run 0.3s linear 0.7s forwards;
}
.wrap .wrap-head .top_box__desc {
  top: 290px;
  width: 522px;
  height: 226px;
  margin-left: -261px;
  background-position: 0 -50px;
  z-index: 5;
  background-size: 800px;
  position: absolute;
  left: 50%;
  font-size: 0;
  background-image: url('https://y.qq.com/artists/js/img/sprite_top_b24c015.png?max_age=25920000');
  opacity: 0;
  animation: run 0.3s linear 0.9s forwards;
}
.wrap .wrap-head .top_box__btn {
  top: 774px;
  z-index: 6;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 260px;
  height: 68px;
  margin-left: -145px;
  font-size: 0;
  border-radius: 68px;
  background: #00ed59;
  position: absolute;
  left: 50%;
  color: #1a1a1a;
  opacity: 0;
  animation: run 0.3s linear 1.2s forwards;
}
.wrap .wrap-head .top_box__btn::after {
  content: "";
  display: block;
  width: 120px;
  height: 27px;
  background-image: url('https://y.qq.com/artists/js/img/sprite_tit_f995b88.png?max_age=25920000');
  background-repeat: no-repeat;
  background-size: 400px auto;
  background-position: 0 -850px;
  opacity: 0;
  animation: run 0.3s linear 1.2s forwards;
}
.wrap .wrap-head .nav {
  color: #1a1a1a;
  position: absolute;
  left: 50%;
  top: 885px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 1000px;
  margin-left: -505px;
}
.wrap .wrap-head .nav .nav__item {
  display: block;
  width: 64px;
  height: 15px;
  margin: 0 40px;
  font-size: 0;
  cursor: pointer;
  background-image: url('https://y.qq.com/artists/js/img/sprite_tit_f995b88.png?max_age=25920000');
  background-repeat: no-repeat;
  background-size: 400px auto;
  background-position: 0 -890px;
}
.wrap .wrap-head .top_box__star {
  font-size: 0;
  font-style: italic;
  background-image: url('https://y.qq.com/artists/js/img/sprite_top_b24c015.png?max_age=25920000');
}
.wrap .wrap-head .top_box__line {
  height: 814px;
  bottom: 144px;
  width: 1480px;
  margin-left: -760px;
  overflow: hidden;
  position: absolute;
  left: 50%;
}
.wrap .wrap-head .top_box__line::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 814px;
  background-image: url('https://y.qq.com/artists/js/img/sprite_top_b24c015.png?max_age=25920000');
  background-position: 0 -580px;
  animation: shoots 0.6s linear;
}
.wrap .wrap-head .top_box__dot {
  position: absolute;
  left: 50%;
  top: 148px;
  width: 1238px;
  height: 290px;
  margin-left: -620px;
  background-position: 0 -1440px;
  font-size: 0;
  background-image: url('https://y.qq.com/artists/js/img/sprite_top_b24c015.png?max_age=25920000');
  animation: shoots 0.4s linear 0.3s;
}
.wrap .mod_part {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 1260px;
  height: 640px;
  margin: 0 auto 50px;
  padding: 0;
}
.wrap .mod_part h1,
.wrap .mod_part h2,
.wrap .mod_part h3,
.wrap .mod_part h4,
.wrap .mod_part h5,
.wrap .mod_part h6 {
  font-size: 100%;
  font-weight: 400;
}
.wrap .mod_part .tit1::before {
  background-position: 0 -1200px;
  margin-top: -80px;
}
.wrap .mod_part .tit2::before {
  background-position: 0 -1300px;
}
.wrap .mod_part .tit2 .tit_txt {
  background-position-y: -97px;
}
.wrap .mod_part .tit3::before {
  background-position: 0 -1400px;
}
.wrap .mod_part .tit3 .tit_txt {
  background-position-y: -195px;
}
.wrap .mod_part .tit4::before {
  background-position: 0 -1500px;
}
.wrap .mod_part .tit4 .tit_txt {
  background-position-y: -293px;
}
.wrap .mod_part .tit5::before {
  background-position: 0 -1600px;
}
.wrap .mod_part .tit5 .tit_txt {
  background-position-y: -400px;
}
.wrap .mod_part .mod_tit::before {
  content: "";
  display: block;
  height: 87px;
  margin-bottom: 30px;
  background-image: url('https://y.qq.com/artists/js/img/sprite_tit_f995b88.png?max_age=25920000');
  background-repeat: no-repeat;
}
.wrap .mod_part .mod_tit .tit_txt {
  display: block;
  width: 400px;
  height: 50px;
  line-height: 999px;
  overflow: hidden;
  background-image: url('https://y.qq.com/artists/js/img/sprite_tit_f995b88.png?max_age=25920000');
  background-repeat: no-repeat;
  background-size: 400px auto;
}
.wrap .mod_part .mod_desc {
  margin-top: 15px;
  font-size: 24px;
  font-weight: 300;
  color: #fff;
}
.wrap .mod_part .mod_more {
  display: flex;
  margin-top: 76px;
  font-size: 24px;
}
.wrap .mod_part .mod_more .more__link {
  display: flex;
  align-items: center;
  color: #fff;
}
.wrap .mod_part .mod_more .more__link .more__arrow {
  display: block;
  width: 10px;
  height: 10px;
  margin-left: 3px;
  border-color: transparent currentcolor currentcolor transparent;
  border-style: solid;
  border-width: 1px;
  transform: rotate(-45deg);
}
.wrap .mod_part .mod_pic {
  position: absolute;
}
.wrap .mod_part .pic11 {
  top: 65px;
  right: 0;
}
.wrap .mod_part .pic12 {
  top: 110px;
  right: 385px;
}
.wrap .mod_part .pic21 {
  top: 150px;
  right: 0;
}
.wrap .mod_part .pic22 {
  top: 380px;
  right: 200px;
}
.wrap .mod_part .pic31 {
  top: 140px;
  right: 0;
}
.wrap .mod_part .pic32 {
  top: 180px;
  right: 40px;
}
.wrap .mod_part .pic33 {
  top: 225px;
  right: 40px;
}
.wrap .mod_part .pic41 {
  top: 60px;
  right: 0;
}
.wrap .mod_part .pic51 {
  top: 160px;
  right: 55px;
}
.wrap .mod_part .pic52 {
  top: 272px;
  right: 0;
}
.wrap .mod_part .pic53 {
  top: 137px;
  right: 86px;
}
.wrap .mod_part .pic54 {
  top: 134px;
  right: 86px;
}
.wrap .btn_bottom {
  display: block;
  width: 260px;
  height: 68px;
  margin: 78px auto 0;
  line-height: 999px;
  overflow: hidden;
}
@keyframes shoots {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1);
  }
}
@keyframes run {
  0% {
    transform: translateY(50px);
    opacity: 0;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}
